#!/usr/bin/python2.5

#

# Copyright 2009 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#   http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Survey (Model) query functions.

"""

__authors__ = [

  '"Daniel Diniz" <ajaksu@gmail.com>',

  '"James Levy" <jamesalexanderlevy@gmail.com>',

  '"Lennard de Rijk" <ljvderijk@gmail.com>',

  ]

import logging

from google.appengine.ext import db

from soc.cache import sidebar

from soc.logic.models import linkable as linkable_logic

from soc.logic.models import survey_record as survey_record_logic

from soc.logic.models.user import logic as user_logic

from soc.logic.models import work

from soc.models.program import Program

from soc.models import student_project

from soc.models.survey import Survey

from soc.models.grading_project_survey import GradingProjectSurvey

from soc.models.grading_record import GradingRecord

from soc.models.project_survey import ProjectSurvey

from soc.models.survey import SurveyContent

from soc.models.survey_record import SurveyRecord

from soc.models.work import Work

class Logic(work.Logic):

  """Logic methods for the Survey model.

  """

  def __init__(self, model=Survey, base_model=Work,

               scope_logic=linkable_logic,

               record_logic=survey_record_logic.logic):

    """Defines the name, key_name and model for this entity.

    params:

      record_logic: SurveyRecordLogic (or subclass) instance for this Survey

    """

    self.record_logic = record_logic

    super(Logic, self).__init__(model=model, base_model=base_model,

                                scope_logic=scope_logic)

  def createSurvey(self, survey_fields, schema, survey_content=False):

    """Create a new survey from prototype.

    params:

      survey_fields = dict of survey field items (see SurveyContent model)

      schema = metadata about survey fields (SurveyContent.schema)

      survey_content = existing SurveyContent entity

    """

    if not survey_content:

      survey_content = SurveyContent()

    else:

      # wipe clean existing dynamic properties if they exist

      for prop in survey_content.dynamic_properties():

        delattr(survey_content, prop)

    for name, value in survey_fields.items():

      setattr(survey_content, name, value)

    survey_content.schema = str(schema)

    db.put(survey_content)

    return survey_content

  def getSurveyForContent(self, survey_content):

    """Returns the Survey belonging to the given SurveyContent.

    params:

      survey_content: the SurveyContent to retrieve the Survey for.

    returns:

      Survey or subclass if possible else None.

    """

    fields = {'survey_content': survey_content}

    return self.getForFields(fields, unique=True)

  def getRecordLogic(self):

    """Returns SurveyRecordLogic that belongs to this SurveyLogic.

    """

    return self.record_logic

  def getDebugUser(self, survey, this_program):

    """Debugging method impersonates other roles.

    Tests taking survey, saving response, and grading.

    params:

      survey = survey entity

      this_program = program scope of survey

    """

    if 'mentor' in survey.taking_access:

      from soc.models.mentor import Mentor

      role = Mentor.get_by_key_name(

      this_program.key().name() + "/org_1/test")

    if 'student' in survey.taking_access:

      from soc.models.student import Student

      role = Student.get_by_key_name(

      this_program.key().name() + "/test")

    if role: return role.user

  def getKeyValuesFromEntity(self, entity):

    """See base.Logic.getKeyNameValues.

    """

    return [entity.prefix, entity.scope_path, entity.link_id]

  def getKeyValuesFromFields(self, fields):

    """See base.Logic.getKeyValuesFromFields.

    """

    return [fields['prefix'], fields['scope_path'], fields['link_id']]

  def getKeyFieldNames(self):

    """See base.Logic.getKeyFieldNames.

    """

    return ['prefix', 'scope_path', 'link_id']

  def getScope(self, entity):

    """Gets Scope for entity.

    params:

      entity = Survey entity

    """

    if getattr(entity, 'scope', None):

      return entity.scope

    import soc.models.program

    import soc.models.organization

    import soc.models.user

    import soc.models.site

    # use prefix to generate dict key

    # determine the type of the scope

    scope_type = scope_types.get(entity.prefix)

    if not scope_type:

      # no matching scope type found

      raise AttributeError('No Matching Scope type found for %s' % entity.prefix)

    # set the scope and update the entity

    entity.scope = scope_type.get_by_key_name(entity.scope_path)

    entity.put()

    # return the scope

    return entity.scope

  def hasRecord(self, survey_entity):

    """Returns True iff the given Survey has at least one SurveyRecord.

    Args:

      survey_entity: a Survey instance

    """

    fields = {'survey': survey_entity}

    record_logic = self.getRecordLogic()

    return record_logic.getQueryForFields(fields).count(1) > 0

  def _onCreate(self, entity):

    """Set the scope of the survey.

    """

    self.getScope(entity)

    super(Logic, self)._onCreate(entity)

class ProjectLogic(Logic):

  """Logic class for ProjectSurvey.

  """

  def __init__(self, model=ProjectSurvey,

               base_model=Survey, scope_logic=linkable_logic,

               record_logic=survey_record_logic.project_logic):

    """Defines the name, key_name and model for this entity.

    """

    super(ProjectLogic, self).__init__(model=model, base_model=base_model,

                                       scope_logic=scope_logic,

                                       record_logic=record_logic)

class GradingProjectLogic(ProjectLogic):

  """Logic class for GradingProjectSurvey.

  """

  def __init__(self, model=GradingProjectSurvey,

               base_model=ProjectSurvey, scope_logic=linkable_logic,

               record_logic=survey_record_logic.grading_logic):

    """Defines the name, key_name and model for this entity.

    """

    super(GradingProjectLogic, self).__init__(model=model,

                                              base_model=base_model,

                                              scope_logic=scope_logic,

                                              record_logic=record_logic)

logic = Logic()

project_logic = ProjectLogic()

grading_logic = GradingProjectLogic()